There is possible to make with a button tag when click on it on the current page fill the contact form textarea?

Like a BUY button and fill the form below with textarea “I wanna buy”?

can you elaborate it a bit??

Like have a BUY button with an a tag and somehow set text when click on it to write in textarea prewrited text?

Sorry i couldn’t get you.
can you provide a link of an example site?

I think about it is something like label for tags. I not really saw it on sites. Just think about how to set textarea text in contact form when click on a button.

so u mean, when you click the button the form should automatically get filled with some text??

Yes something about this. Maybe with JS. I need research

something like this: https://jsbin.com/qilukufevu/1/edit?html,js,output